Get a laugh here: Essence of Political Science.

A few examples:

Bureaucracy

You have two cows. At first the government regulates what you can feed them and when you can milk them. Then it pays you not to milk them. Then it takes both, shoots one, milks the other and pours the milk down the drain. Then it requires you to fill out forms accounting for the missing cows.

Pure Anarchy

You have two cows. Either you sell the milk at a fair price or your neighbors try to take the cows and kill you.

Pure Capitalism

You have two cows. You sell one and buy a bull.

Real World Communism

You share two cows with your neighbors. You and your neighbors bicker about who has the most "ability" and who has the most "need". Meanwhile, no one works, no one gets any milk, and the cows drop dead of starvation.